# git rev-parse -q --verify 86de312343c4b56d699f8ed98aac8bdab1e94225^{commit} 86de312343c4b56d699f8ed98aac8bdab1e94225 already have revision, skipping fetch # git checkout -q -f -B kisskb 86de312343c4b56d699f8ed98aac8bdab1e94225 # git clean -qxdf # < git log -1 # commit 86de312343c4b56d699f8ed98aac8bdab1e94225 # Author: Nicholas Piggin # Date: Mon Jun 10 13:08:18 2019 +1000 # # powerpc/64s/radix: Enable HAVE_ARCH_HUGE_VMAP # # This sets the HAVE_ARCH_HUGE_VMAP option, and defines the required # page table functions. # # This enables huge (2MB and 1GB) ioremap mappings. I don't have a # benchmark for this change, but huge vmap will be used by a later core # kernel change to enable huge vmalloc memory mappings. This improves # cached `git diff` performance by about 5% on a 2-node POWER9 with 32MB # size dentry cache hash. # # Profiling git diff dTLB misses with a vanilla kernel: # # 81.75% git [kernel.vmlinux] [k] __d_lookup_rcu # 7.21% git [kernel.vmlinux] [k] strncpy_from_user # 1.77% git [kernel.vmlinux] [k] find_get_entry # 1.59% git [kernel.vmlinux] [k] kmem_cache_free # # 40,168 dTLB-miss # 0.100342754 seconds time elapsed # # With powerpc huge vmalloc: # # 2,987 dTLB-miss # 0.095933138 seconds time elapsed # # Signed-off-by: Nicholas Piggin # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 86de312343c4b56d699f8ed98aac8bdab1e94225 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc86xx_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1658:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] return oldval == cmparg; ^ /kisskb/src/kernel/futex.c:1633:6: note: 'oldval' was declared here int oldval, ret; ^ /kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:140.22-142.4: Warning (pci_bridge): /pcie@f1008000: missing ranges for PCI bridge (or not a bridge) also defined at /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:97.7-122.3 /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:107.9-121.4: Warning (pci_bridge): /pcie@f1008000/pcie@0: missing ranges for PCI bridge (or not a bridge) /kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:144.22-146.4: Warning (pci_bridge): /pcie@f1009000: missing ranges for PCI bridge (or not a bridge) also defined at /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:124.7-149.3 /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8641si-post.dtsi:134.9-148.4: Warning (pci_bridge): /pcie@f1009000/pcie@0: missing ranges for PCI bridge (or not a bridge) arch/powerpc/boot/dts/fsl/mvme7100.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' /kisskb/src/arch/powerpc/boot/dts/fsl/mvme7100.dts:35.11-37.6: Warning (i2c_bus_reg): /soc@f1000000/i2c@3000/rtc@68: missing or empty reg property INFO: Uncompressed kernel (size 0xa4b0dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-5.2.0-rc2-g86de312343c4 Created: Sun Jun 16 23:12:06 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5081578 Bytes = 4962.48 KiB = 4.85 MiB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-next_mpc86xx_defconfig_powerpc-gcc5 # Build took: 0:01:04.735488